| 摘要 |
PURPOSE: To prevent color irregularity caused by irregularity by plasticizing supplied raw material pellets and a liquid color. CONSTITUTION: The raw material pellets P supplied to the base part of a screw 26 are transferred through a feed zone F in the left direction A in a pellet state by rotating a screw. Since the cross-sectional area of the groove of the screw 226 begins to reduce from the vicinity of the part coming to a compression zone C, the pellets receive compression/shearing action and begin to melt by the heating action of a heater 28. Since the cross-sectional area of the groove of the screw 227 is reduced in a definite ratio in the compression zone C, a resin is sufficiently compressed and melted to be transferred to the metering zone M of the leading end of the screw. The resin passed through the metering zone M is passed through a ball check type screw head 29 in a molten state to be stored in a resin sump 37. As the transferred resin is stored in the resin sump 37, the screw 26 is pushed by the pressure thereof to be moved in the right direction B. |
